I wonder why the letter k is not in the expected place, and why the path to sigma is oddly positioned. what's going on :)

enter image description here

  nat/.style     = {fill=white,draw,circle,minimum size=0.5cm,inner sep=1pt},

  nat/.style     = {fill=white,draw,circle,minimum size=0.5cm,inner sep=1pt},
  \draw (1,4) -- (1,3)
      node[pos=1,nat] (s) {$\sigma$};
      node[pos=0,nat,above] {$k$};
  \draw (2,0) node[below] {$l$} to[out=90, in=-90] (s);
  \draw (3,0) -- (3,4)
      node[pos=0,below] {$x$}
      node[pos=0.8,nat] (a) {$a$}
      node[pos=1,above] {$x$};
  \draw (1,0) node[below] {$m$} to[bend left] (a);

closed as off-topic by CarLaTeX, percusse, Stefan Pinnow, Torbjørn T., TeXnician Jun 19 '17 at 8:31

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  • 3
    There is a semicolon after {$\sigma$} – Raoul Kessels Jun 19 '17 at 6:40
  • damn semi colon !! that's what happens when you use too much haskell / ocaml and co ! :) thank you – nicolas Jun 19 '17 at 7:23
  • 4
    I'm voting to close this question as off-topic because the error was due to a typo as shown in comments. – CarLaTeX Jun 19 '17 at 7:30
  • justo. non sarà molto utile per altri – nicolas Jun 19 '17 at 7:34

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